Sequestering ability of some chelating agents towards methylmercury(II)

Antonio Gianguzza, Daniela Piazzese, Alberto Pettignano, Gabriella Falcone, Anna Napoli, Ottavia Giuffrè, Claudia Foti

Risultato della ricerca: Article

25 Citazioni (Scopus)

Abstract

A study on the interactions between CH3Hg+ and some S, N and O donor ligands (2-mercaptopropanoic acid (thiolactic acid (H2TLA)), 3-mercaptopropanoic acid(H2MPA), 2-mercaptosuccinic acid (thiomalic acid (H3TMA)), D,L-penicillamine (H2PSH), L-cysteine (H2CYS), glutathione (H3GSH), N,N′-bis(3-aminopropyl)-1-4-diaminobutane (spermine (SPER)), 1,2,3,4,5,6-benzenehexacarboxylic acid (mellitic acid (H6MLT)) and ethylenediaminetetraaceticacid (H4EDTA)) is reported. The speciationmodels in aqueous solution and the possible structures of the complexes formed are discussed on the basis of potentiometric,calorimetric, UV spectrophotometric and electrospray mass spectrometric results. For the CH3Hg+–S donor ligand systems, the formation ofML1–z and MLH2–z complex speciesis observed, together with a diprotonated MLH23–z species for CYS2−, PSH2− and GSH3− and the mixed hydrolytic one ML(OH)−z for TLA2− and MPA2−. The dependence of the stability on ionic strength and on temperature is also analysed. In the other CH3Hg+-L systems (L0MLT6−, SPER and EDTA4−),ML1–z, MLH2–z and MLH23–z complex species are formed, together with the MLH34–z species for SPER, the mixed hydrolytic ML(OH)–z one for SPER and EDTA, and the M2L2–z for EDTA only. On the basis of the speciation models proposed, the sequestering ability of the ligands towards methylmercury(II) cation is evaluated. All S donor ligands show agood sequestering power (at 10−11molL−1 level, in the pH range 4 to 8) following the trend MPA2−<PSH2−<GSH3−<TLA2−<CYS2−<TMA3−, while significantly lower is the sequesteringability of MLT, SPER and EDTA (at 10−3 10−5 mol L−1 level, in the pH range 4 to 8).
Lingua originaleEnglish
pagine (da-a)881-893
Numero di pagine13
RivistaAnalytical and Bioanalytical Chemistry
Volume405
Stato di pubblicazionePublished - 2013

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Spermine
Chelating Agents
Edetic Acid
Ligands
3-Mercaptopropionic Acid
Penicillamine
Acids
Putrescine
Ionic strength
Osmolar Concentration
Glutathione
Cysteine
methylmercury II
Temperature

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry

Cita questo

Sequestering ability of some chelating agents towards methylmercury(II). / Gianguzza, Antonio; Piazzese, Daniela; Pettignano, Alberto; Falcone, Gabriella; Napoli, Anna; Giuffrè, Ottavia; Foti, Claudia.

In: Analytical and Bioanalytical Chemistry, Vol. 405, 2013, pag. 881-893.

Risultato della ricerca: Article

Gianguzza, Antonio ; Piazzese, Daniela ; Pettignano, Alberto ; Falcone, Gabriella ; Napoli, Anna ; Giuffrè, Ottavia ; Foti, Claudia. / Sequestering ability of some chelating agents towards methylmercury(II). In: Analytical and Bioanalytical Chemistry. 2013 ; Vol. 405. pagg. 881-893.
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abstract = "A study on the interactions between CH3Hg+ and some S, N and O donor ligands (2-mercaptopropanoic acid (thiolactic acid (H2TLA)), 3-mercaptopropanoic acid(H2MPA), 2-mercaptosuccinic acid (thiomalic acid (H3TMA)), D,L-penicillamine (H2PSH), L-cysteine (H2CYS), glutathione (H3GSH), N,N′-bis(3-aminopropyl)-1-4-diaminobutane (spermine (SPER)), 1,2,3,4,5,6-benzenehexacarboxylic acid (mellitic acid (H6MLT)) and ethylenediaminetetraaceticacid (H4EDTA)) is reported. The speciationmodels in aqueous solution and the possible structures of the complexes formed are discussed on the basis of potentiometric,calorimetric, UV spectrophotometric and electrospray mass spectrometric results. For the CH3Hg+–S donor ligand systems, the formation ofML1–z and MLH2–z complex speciesis observed, together with a diprotonated MLH23–z species for CYS2−, PSH2− and GSH3− and the mixed hydrolytic one ML(OH)−z for TLA2− and MPA2−. The dependence of the stability on ionic strength and on temperature is also analysed. In the other CH3Hg+-L systems (L0MLT6−, SPER and EDTA4−),ML1–z, MLH2–z and MLH23–z complex species are formed, together with the MLH34–z species for SPER, the mixed hydrolytic ML(OH)–z one for SPER and EDTA, and the M2L2–z for EDTA only. On the basis of the speciation models proposed, the sequestering ability of the ligands towards methylmercury(II) cation is evaluated. All S donor ligands show agood sequestering power (at 10−11molL−1 level, in the pH range 4 to 8) following the trend MPA2−<PSH2−<GSH3−<TLA2−<CYS2−<TMA3−, while significantly lower is the sequesteringability of MLT, SPER and EDTA (at 10−3 10−5 mol L−1 level, in the pH range 4 to 8).",
author = "Antonio Gianguzza and Daniela Piazzese and Alberto Pettignano and Gabriella Falcone and Anna Napoli and Ottavia Giuffr{\`e} and Claudia Foti",
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TY - JOUR

T1 - Sequestering ability of some chelating agents towards methylmercury(II)

AU - Gianguzza, Antonio

AU - Piazzese, Daniela

AU - Pettignano, Alberto

AU - Falcone, Gabriella

AU - Napoli, Anna

AU - Giuffrè, Ottavia

AU - Foti, Claudia

PY - 2013

Y1 - 2013

N2 - A study on the interactions between CH3Hg+ and some S, N and O donor ligands (2-mercaptopropanoic acid (thiolactic acid (H2TLA)), 3-mercaptopropanoic acid(H2MPA), 2-mercaptosuccinic acid (thiomalic acid (H3TMA)), D,L-penicillamine (H2PSH), L-cysteine (H2CYS), glutathione (H3GSH), N,N′-bis(3-aminopropyl)-1-4-diaminobutane (spermine (SPER)), 1,2,3,4,5,6-benzenehexacarboxylic acid (mellitic acid (H6MLT)) and ethylenediaminetetraaceticacid (H4EDTA)) is reported. The speciationmodels in aqueous solution and the possible structures of the complexes formed are discussed on the basis of potentiometric,calorimetric, UV spectrophotometric and electrospray mass spectrometric results. For the CH3Hg+–S donor ligand systems, the formation ofML1–z and MLH2–z complex speciesis observed, together with a diprotonated MLH23–z species for CYS2−, PSH2− and GSH3− and the mixed hydrolytic one ML(OH)−z for TLA2− and MPA2−. The dependence of the stability on ionic strength and on temperature is also analysed. In the other CH3Hg+-L systems (L0MLT6−, SPER and EDTA4−),ML1–z, MLH2–z and MLH23–z complex species are formed, together with the MLH34–z species for SPER, the mixed hydrolytic ML(OH)–z one for SPER and EDTA, and the M2L2–z for EDTA only. On the basis of the speciation models proposed, the sequestering ability of the ligands towards methylmercury(II) cation is evaluated. All S donor ligands show agood sequestering power (at 10−11molL−1 level, in the pH range 4 to 8) following the trend MPA2−<PSH2−<GSH3−<TLA2−<CYS2−<TMA3−, while significantly lower is the sequesteringability of MLT, SPER and EDTA (at 10−3 10−5 mol L−1 level, in the pH range 4 to 8).

AB - A study on the interactions between CH3Hg+ and some S, N and O donor ligands (2-mercaptopropanoic acid (thiolactic acid (H2TLA)), 3-mercaptopropanoic acid(H2MPA), 2-mercaptosuccinic acid (thiomalic acid (H3TMA)), D,L-penicillamine (H2PSH), L-cysteine (H2CYS), glutathione (H3GSH), N,N′-bis(3-aminopropyl)-1-4-diaminobutane (spermine (SPER)), 1,2,3,4,5,6-benzenehexacarboxylic acid (mellitic acid (H6MLT)) and ethylenediaminetetraaceticacid (H4EDTA)) is reported. The speciationmodels in aqueous solution and the possible structures of the complexes formed are discussed on the basis of potentiometric,calorimetric, UV spectrophotometric and electrospray mass spectrometric results. For the CH3Hg+–S donor ligand systems, the formation ofML1–z and MLH2–z complex speciesis observed, together with a diprotonated MLH23–z species for CYS2−, PSH2− and GSH3− and the mixed hydrolytic one ML(OH)−z for TLA2− and MPA2−. The dependence of the stability on ionic strength and on temperature is also analysed. In the other CH3Hg+-L systems (L0MLT6−, SPER and EDTA4−),ML1–z, MLH2–z and MLH23–z complex species are formed, together with the MLH34–z species for SPER, the mixed hydrolytic ML(OH)–z one for SPER and EDTA, and the M2L2–z for EDTA only. On the basis of the speciation models proposed, the sequestering ability of the ligands towards methylmercury(II) cation is evaluated. All S donor ligands show agood sequestering power (at 10−11molL−1 level, in the pH range 4 to 8) following the trend MPA2−<PSH2−<GSH3−<TLA2−<CYS2−<TMA3−, while significantly lower is the sequesteringability of MLT, SPER and EDTA (at 10−3 10−5 mol L−1 level, in the pH range 4 to 8).

UR - http://hdl.handle.net/10447/71278

M3 - Article

VL - 405

SP - 881

EP - 893

JO - Fresenius Zeitschrift fur Analytische Chemie

JF - Fresenius Zeitschrift fur Analytische Chemie

SN - 0016-1152

ER -